HRP20221182A1 - Device and method for fabrication of concrete sewer manhole with watertight plastic floor and cast iron frame - Google Patents

Abstract

The subject invention discloses a device (100) and a method (200) for making a concrete sewer shaft with a waterproof plastic floor and a cast iron frame (10). The device (100) for making a concrete sewer shaft with a waterproof plastic floor and a cast iron frame (10) consists of an inner cylindrical mold (110), an outer cylindrical mold (120), a waterproof plastic floor (12), a device for mixing concrete (130) ), concrete dispenser (140), vibrating device (150), steel ring (160), cast iron frame (14) and hydraulic finishing head (170). The disclosed device (100) enables the implementation of the process (200) of manufacturing a concrete sewer shaft with a watertight plastic floor and a cast iron frame (10) in such a way that during the production process the possibility of vibrating the internal cylindrical mold (110) and the watertight plastic floor (12) is ensured by variable intensity of vibration and the possibility of hydraulic treatment of the shaft with different power during the manufacturing process (200), which ensures reliable integration of the waterproof floor into the concrete base of the shaft. The manufacturing process (200) consists of four phases. The subject invention discloses a device (100) and a method (200) for fabrication of a concrete sewer manhole with a watertight plastic floor and a cast iron frame (10). The device (100) for fabrication of a concrete sewer manhole with a waterproof plastic floor and a cast iron frame (10) comprises an inner cylindrical mold (110), an outer cylindrical mold (120), a waterproof plastic floor (12), a device for mixing concrete (130), concrete dispenser (140), vibrating device (150), steel ring (160), cast iron frame (14) and hydraulic finishing head (170). The disclosed device (100) enables the implementation of the method (200) of manufacturing a concrete sewer manhole with a waterproof plastic floor and a cast iron frame (10) in such a way that during the production process, the possibility of vibrating the internal cylindrical mold (110) and the watertight plastic floor (12) is ensured by variable intensity of vibration while the possibility of hydraulic treatment of the manhole with different power during the fabrication process (200), ensures reliable integration of the watertight floor into the concrete base of the manhole. The fabrication process (200) consists of four stages.

Description

Technical field to which the invention relates

The subject invention relates to the field of devices and procedures for the production of concrete elements for sewage systems, in particular devices and procedures for the production of concrete sewer shafts with a waterproof plastic floor and a cast iron frame, which are used in systems for the drainage of wastewater from households, precipitation or industrial facility. The disclosed process includes manufacturing processes based on the use of molds, injection of materials and the use of hydraulic machines (E02D 29/12 [2006.1], E02D 29/16 [2006.01], E02D2250/0007, E02D2250/003, E02D2250/0092).

Technical problem

Sewage systems are complex systems that consist of various elements such as sewer shafts, sewer pipes, pumping stations, overflow structures, etc. They are used for the drainage of wastewater from households, precipitation or industrial plants. An essential element of such systems are sewer shafts, which are used to inspect the drainage system, change the direction of the sewer pipeline, change the slope and diameter of the sewer pipes, etc. Sewer pipes are connected to the side of the sewer shafts, and a cover is placed on top of the shaft. Sewer shafts are most often made of concrete due to the required strength and the need for a large mass of the sewer shaft, which cancels the buoyancy forces caused by underground water. The problem of using concrete to create a sewer shaft is that it is difficult to achieve a watertight connection with sewer pipes, which has a negative effect on the environment due to the leakage of sewage water. Therefore, ensuring the watertightness of the sewer shaft is of significant importance.

The invention in question solves the technical problem of integrating a waterproof plastic floor into a concrete sewer manhole during the process of manufacturing the manhole while ensuring the waterproofness of the concrete sewer manhole. For the manufacture of a complex structure with the connection of two different materials, such as a concrete shaft and a waterproof plastic floor, a special manufacturing process is required to ensure reliable integration of the waterproof plastic floor into the concrete shaft. The purpose of integrating a watertight plastic floor into a concrete shaft is to ensure the watertightness of the sewer shaft and the watertightness of the connection between the sewer shaft and the pipes. By using a waterproof plastic floor, it is possible to connect sewer pipes made of different materials such as concrete, plastic, ceramics or cast iron. Also, by using waterproof plastic floors, it is possible to connect the sewer pipe at angles different from the right angle in relation to the longitudinal axis of the sewer shaft.

Another technical problem that is solved by the disclosed device and method is to speed up the production process of a concrete sewer shaft with a waterproof plastic floor and a cast iron frame. The subject invention shortens the minimum time that must elapse from the dosing of concrete to the moment of removal of the formwork. This is achieved in such a way that the waterproof plastic floor is an integral part of the device for the creation of a concrete sewer shaft, and it is installed in the shaft parallel to the creation of the concrete base of the shaft. In this way, it is possible to produce a larger number of sewer shafts in a unit of time.

The third technical problem solved by this invention is the integration of a cast iron frame into a concrete shaft to form the upper edge of the base of the shaft, which enables the installation of an iron cover on the sewer shaft.

The fourth technical problem solved by this invention is the facilitation of transportation of a concrete sewer shaft with a waterproof plastic floor and a cast iron frame, which is made possible by using a steel ring placed under the cast iron frame. The steel ring enables the transport of a concrete sewer shaft with a waterproof plastic floor and a cast iron frame by forklift without damage, because the weight of the sewer shaft is transferred via the steel ring to the forks of the forklift, which are not in direct contact with the concrete of the shaft. The use of a steel ring enables the transport of a concrete sewer manhole with a waterproof plastic floor and a cast iron frame until the concrete is completely dry.

State of the art

The state of the art in the field of manufacturing concrete sewer manholes includes a significant number of documents and sources that describe the devices and procedures for the production of sewer manholes. Sources available in the state of the art, relevant to the disclosed invention, describe designs that use waterproof materials in the form of coating the inner concrete surface of the shaft with waterproof material or making the entire shaft from waterproof material, which is additionally reinforced with concrete. A brief overview of the most important sources is given below.

Document KR101053677B1 "A MANHOLE", JO BONG HYUN discloses the device and process of manufacturing a manhole. The document describes a sewer shaft that consists of two plastic parts (floor and base), which are joined together before pouring concrete. An integral part of the floor are the outlets to which the sewer pipes outside the shaft are connected. With the procedure disclosed in the mentioned document, concrete is poured around the floor with the outlets, which ensures the strength of the floor of the sewer shaft and reduces the effect of the buoyancy force caused by the action of underground water. In addition to the floor, concrete is also poured around the outlet and the base for the cover in order to strengthen the outer part of the sewer shaft, which is exposed to external influences and must have a high load capacity due to its placement on roads and sidewalks. The proposed device and manufacturing process, due to the fact that the entire inside of the sewer shaft is made of waterproof material, ensure that the sewer shaft maintains its watertightness even in case of concrete cracking.

Document KR101065936B1 "Manholes and its synthetic resin manufacturing methods", EUN SUNG JIN discloses a device and process for manufacturing a manhole with a synthetic resin base. The proposed device is based on a layer of synthetic resin located inside the concrete structure of the sewer shaft. The inside of the sewer shaft is covered with a layer of synthetic material to prevent the corrosive effect of waste water and sewage on the sewer shaft, and their leakage into the environment. The process of creating a sewer manhole enables simple production, installation and maintenance of the manhole.

Document JPH0885963A "MANUFACTURE OF MANHOLE FOR SEWERAGE FACILITIES", KOGA MOTOYUKI; OSHIMA KENJI; ARASAKI KAZUO discovers the process of producing acid-resistant sewer manholes by forming a layer of resin on the inner walls of the manhole. The resin-impregnated material, which has the property of thermal hardening, is attached to the peripheral surface of the inner concrete formwork containing the pallet supported by a vibrating ring. Rebars and inserts are arranged around the inner formwork and then the outer formwork is installed. The concrete is placed in the mold space, while the formwork is vibrated using a vibrating machine mounted on the inside of the inner formwork, the placed concrete is compacted, and the top is pressed using a pressure machine in the final stage. Then the pressing machine is withdrawn and the molds are removed. In this way, a concrete block for the shaft with an inner layer resistant to acids is obtained.

Document KR101263996B1 "SUBSTRUCTURE OF THE SEWAGE MANHOLE WHICH IS COMPOSED MULTI MATERIAL AND MANUFACTURING METHOD THE SAME", HEO, WON GWON discloses a sewer manhole consisting of a sewer manhole substructure composed of a composite material and a cylindrical body made of fiber sewer pipe. The document also disclosed a process for its production, which includes making a cylindrical shaft body from a large-diameter fiber sewer pipe by cutting it to a predetermined length. The procedure consists of several steps: preparation of the component for configuration and preparation of the shaft body, installation of the base plate in the place where the shaft is to be installed, assembly of the shaft body and floor, assembly of the shaft body, filling with mortar and filling with plaster between the shaft body and the base plate.

Document KR101352294B1 "Manufacture of concrete blocks for sewer manhole", CHOE, YOUNG DEOK discloses a process for manufacturing a concrete block for a sewer manhole, which includes: a preparatory step of molding the manhole block, a primary step of forming a manhole block in which a number of installation holes for the connecting pipe formed by placing the mortar in the prepared mold and hardening the mortar, the step of removing the shaft block from the mold, the step of placing the connecting pipe, gasket and connecting pipe in the installation hole, wrapping the outer surface of the connecting pipe, the secondary step of molding, injecting the mortar into the mold and removing the mold. The subject invention facilitates production and achieves watertightness between the connecting pipe and the shaft block.

Document US10961681B2 "Manhole assembly", Friesen, Jed Christopher discloses a manhole consisting of a base with an anti-corrosive layer. The document proposes a sewer shaft consisting of a floor, a base and a cover. The upper surface of the floor, including channels and outlets, is coated with an anti-corrosion layer to protect the concrete. The base of the sewer shaft is made of an anti-corrosive material, such as polyvinyl chloride, or contains an anti-corrosive material.

Document KR101062883B1 "GLASS FIBER REINFORCED PLASTIC MANHOLE AND METHOD FOR FABRICATING THE SAME", KIM JU BUM et al., discloses the device and process for manufacturing plastic manholes. As described in the document, the base of the proposed sewer shaft is made by multi-layer lamination with plastic fibers in order to strengthen the base. A concrete roller is poured on the lower part of the base to strengthen the bottom and eliminate the possibility of the shaft rising due to the action of groundwater. A concrete roller with an opening for the shaft cover is poured on the upper part of the base. Outlets for connecting sewage pipes are welded to the base of the shaft after drilling side holes on the base at the point of connection.

The basic difference of the subject invention compared to the state of the art is in the device and the production process, whereby the subject invention disclosed an innovative device for the production of a concrete sewer shaft with a waterproof plastic floor and a cast iron frame and an innovative process for the production of shafts with variable shaft vibration intensity and hydraulic shaft processing variable strength during the production process, which ensures reliable integration of the waterproof floor into the concrete shaft base.

Presentation of the essence of the invention

The subject invention discloses a device and a process for making a concrete sewer shaft with a waterproof plastic floor and a cast iron frame.

A concrete sewer manhole with a watertight plastic floor and a cast iron frame, which is produced by the device and process disclosed by the subject invention, contains a concrete base, a watertight plastic floor with an opening for connecting the sewer pipe, a cast iron frame and a cover for closing the manhole. The opening for connecting the sewer pipe, which is an integral part of the plastic floor, enables easier connection of the sewer pipe with the shaft and at angles different from the right angle in relation to the longitudinal axis of the sewer shaft.

The device for making a concrete sewer shaft, disclosed by the subject invention, consists of an inner and outer cylindrical mold made of steel, a waterproof plastic floor that is placed on the inner cylindrical mold, a device for mixing concrete and a concrete dispenser, a vibrating device, a cast iron frame that is placed on a steel ring and hydraulic heads for finishing. The disclosed device enables the implementation of the process of making a concrete sewer shaft with a watertight plastic floor and a cast iron frame in such a way that during the production process, the possibility of vibrating the inner cylindrical shaft and the watertight plastic floor with variable vibration intensity is ensured, as well as the possibility of hydraulic processing of the shaft with different power during the production process, which ensures a reliable integration of the waterproof floor into the concrete shaft base. The use of a steel ring enables the transport of a concrete sewer shaft with a waterproof plastic floor and a cast iron frame with a forklift without damage.

The process of manufacturing a concrete sewer shaft with a waterproof plastic floor and a cast iron frame, disclosed by the subject invention, consists of four phases. The procedure is divided into four phases in order to coordinate the initialization procedures of the device for making a concrete sewer shaft with a waterproof plastic floor and a cast iron frame, concrete dosing, vibrating, hydraulic treatment and drying. The initialization phase provides the conditions necessary for the start of operation of the device for the production of a concrete sewer shaft with a waterproof plastic floor and a cast iron frame. By harmonizing the procedures for dosing concrete and vibrating at different intensities during the construction of a concrete sewer shaft with a waterproof plastic floor and a cast iron frame, the problem of making a concrete base and its integration with a watertight plastic floor and a cast iron frame is solved.

In certain examples of the implementation of the subject invention, the vibration of the shaft at different intensities during the production process of a concrete sewer shaft with a waterproof plastic floor and cast iron frame can be changed several times during the implementation of the second phase of the production process of a concrete sewer shaft with a watertight plastic floor and cast iron frame. The intensity of vibration depends on the dimensions of the concrete sewer shaft with a waterproof plastic floor and a cast iron frame.

In certain examples of the implementation of the subject invention, the hydraulic processing of the shaft can be carried out in such a way that the strength of the hydraulic processing changes several times during the third stage of the production process of a concrete sewer shaft with a waterproof plastic floor and a cast iron frame. The power of the hydraulic treatment depends on the dimensions of the concrete sewer shaft with a waterproof plastic floor and a cast iron frame.

Short description of the pictures

Drawing 1 shows an example of a concrete sewer manhole with a watertight plastic floor (10) containing a concrete base (11), a watertight plastic floor (12), a manhole cover (13) and a cast iron frame (14).

Drawing 2 shows an example of a device for making a concrete sewer shaft with a waterproof plastic floor and a cast iron frame (100), which consists of an inner cylindrical mold (110), an outer cylindrical mold (120), a waterproof plastic floor (12), a mixing device concrete (140), concrete dispenser (150), vibrating device (160), steel ring (170), cast iron frame (14) and hydraulic finishing head (180).

Drawing 3 shows the flow diagram of the process of making a concrete sewer shaft with a waterproof plastic floor and a cast iron frame (200), which consists of four phases, which coordinate the initialization procedures of the device for making a concrete sewer shaft with a watertight plastic floor and a cast iron frame (10 ), concrete dosing, vibration and hydraulic processing.

Detailed description of the invention

The subject invention relates to the device and the process of making a concrete sewer shaft with a waterproof plastic floor and a cast iron frame. Sewer pipes are connected to the sewer shafts, and a cover is placed on top of the shaft. Such manholes are used to inspect the drainage system, change the direction of the sewage pipeline, change the slope and diameter of the sewer pipes, etc. An example of a concrete sewer manhole with a watertight plastic floor and cast iron frame is shown in drawing 1. A concrete manhole with a watertight plastic floor and cast iron frame (10) contains a concrete base (11), a waterproof plastic floor (12), a cover for closing the shaft (13) and a cast iron frame (14).

The device (100) itself for making a concrete sewer shaft with a watertight plastic floor and a cast iron frame (10), disclosed according to the present invention, is shown in drawing 2. A device (100) for making a concrete sewer shaft with a watertight plastic floor and a cast iron frame (10) consists of an inner cylindrical mold (110), an outer cylindrical mold (120), a waterproof plastic floor (12), a concrete mixing device (130), a concrete dispenser (140), a vibrating device (150), a steel ring (160), cast iron frame (14) and hydraulic finishing head (170). The concrete mixing device (130) mixes the concrete mixture, which can have different concentrations of ingredients depending on the dimensions of the concrete sewer shaft with a waterproof plastic floor and cast iron frame (10). The concrete dispenser (140) dispenses concrete between the inner cylindrical mold (110), to which the waterproof plastic floor (12) is connected, and the outer cylindrical mold (120) at different speeds depending on the stage of the production process of making a concrete sewer shaft with a waterproof plastic floor and cast iron frame (10). The inner cylindrical mold (110) has a smaller diameter than the outer cylindrical mold (120), where the difference in diameter determines the thickness of the concrete wall of the sewer shaft with a waterproof plastic floor and cast iron frame (10). The inner cylindrical mold (110) has a cone (111) on the upper side, which enables the waterproof plastic floor (12) to be placed on top of it. At the bottom of the inner cylindrical mold (110) there is a steel ring (160) on which a cast iron frame (14) is placed, which serves to create an edge at the base of the sewer shaft (11), and whose function is to precisely fit the cover to close the shaft ( 13) on the shaft base (11). The vibrating device (150) is connected to the inner cylindrical mold (110) and enables the vibration of the inner cylindrical mold (110) and the watertight plastic floor (12) with different intensities depending on the stage of the production process of making a concrete sewer shaft with a watertight plastic floor and cast iron frame (10). The joint vibration of the inner cylindrical mold (110) and the watertight plastic floor (12) enables the complete filling of all gaps in the base of the sewer shaft (11) with concrete. The hydraulic finishing head (180), which has a circular shape with a diameter equal to the diameter of the base of the sewer manhole (11), is used for finishing the outer bottom of the concrete sewer manhole with a waterproof plastic floor and cast iron frame (10) and processes the concrete manhole with different intensity depending on the moment in time of the production process of making the sewer shaft.

The process (200) of making a concrete sewer shaft with a waterproof plastic floor and a cast iron frame (10) is shown in drawing 3. The production process consists of four phases:

- 1st phase (210) - In this phase, the device (100) is initialized for the production of a concrete sewer shaft with a waterproof plastic floor and a cast iron frame (10). Initialization involves concentric placement of the inner (110) and outer cylindrical mold (120), placement of a waterproof plastic floor (12) on the inner cylindrical mold (110), placement of a steel ring (160) with a pre-positioned cast iron frame (14) to form the upper edge shaft bases and concrete mixing.

- 2nd phase (220) - In this phase, concrete is dosed into the space between the outer cylindrical mold (120) and the inner cylindrical mold (110) on which the waterproof plastic floor (12) is placed. The intensity of concrete dosing can be different depending on the dimensions of the concrete sewer shaft with waterproof plastic floor and cast iron frame (10). In this phase, the internal cylindrical mold (110) and the waterproof plastic floor (12) begin to vibrate with an intensity dependent on the dimensions of the concrete base of the shaft (11). The vibration starts with a time delay compared to the beginning of the concrete dosing, and its intensity changes several times during this phase.

- 3rd phase (230) - In this phase, the dosing of concrete is stopped and the hydraulic finishing of the concrete sewer shaft with a waterproof plastic floor and a cast iron frame (10) begins, which takes place in parallel with the vibration of the internal cylindrical mold (110) and waterproof plastic floors (12). The power of the hydraulic treatment changes several times during this phase.

- 4th stage (240) - In this stage, the vibration of the inner cylindrical mold (110) and the waterproof plastic floor (12) is stopped and the hydraulic finishing is completed. The concrete sewer manhole with waterproof plastic floor (12) and cast iron frame (10) is removed from the inner cylindrical mold (110) and the outer cylindrical mold (120), after which it is dried.

Industrial applicability

The industrial applicability of the subject invention is confirmed by the available solutions from the review of the state of the art.

References

10 sewer manhole with waterproof plastic floor and cast iron frame

11 concrete base

12 waterproof floor

13 lid for closing the window

14 cast iron frame

100 devices

110 internal cylindrical mold

111 groove on the inner cylindrical mold

120 external cylindrical mold

130 device for mixing concrete

140 concrete dispenser

150 vibrating device

160 steel ring

170 hydraulic head for finishing

200 procedure

210 1st stage

220 2nd phase

230 3rd stage

240 4th stage

Claims (15)

1. Device (100) for making a concrete sewer shaft with a waterproof plastic floor and a cast iron frame (10), which consists of: a. of the inner cylindrical mold (110) and the outer cylindrical mold (120) b. waterproof plastic floors (12) c. concrete mixing devices (130) d. concrete dispenser (140) e. vibrating device (150) f. steel ring (160) Mr. cast iron frame (14) h. hydraulic heads for finishing (170). 2. Molds according to claim 1, characterized in that the inner cylindrical mold (110) has a cone (111) on the upper side designed for placing a waterproof plastic floor (12). 3. Waterproof plastic floor (12) according to claim 1, characterized in that it has the same diameter as the inner cylindrical mold (110) and is placed on the upper part of the inner cylindrical mold (110). 4. The device for mixing concrete (130) according to claim 1, characterized in that it mixes substances of which concrete consists in different concentrations for different dimensions of the sewer shaft with a waterproof plastic floor and a cast iron frame (10). 5. Concrete dispenser (140) according to claim 1, characterized in that it dispenses the concrete mixture at different speeds depending on the time of the production process of making a sewer shaft with a waterproof plastic floor and a cast iron frame (10). 6. Vibrating device (150) according to claim 1, characterized in that it vibrates the inner cylindrical mold (110) and the watertight plastic floor (12) with different intensity depending on the time of the production process of the sewer shaft with watertight plastic floor and cast iron frame ( 10). 7. Steel ring (160) according to claim 1, characterized in that it is placed on the bottom of the inner cylindrical mold (110) and has an outer diameter smaller than the diameter of the outer cylindrical mold (120), and an inner diameter larger than the diameter of the inner cylindrical mold ( 110). 8. Cast iron frame (14) according to claim 1, characterized in that it is placed on a steel ring (160) and has an outer diameter smaller than the diameter of the outer cylindrical mold (120), and an inner diameter larger than the diameter of the inner cylindrical mold (110) . The cast iron frame (14) has an edge that allows the iron cover (13) to be placed in the concrete base (11). 9. The hydraulic head (170) according to claim 1, characterized in that it has a circular shape with a diameter equal to the diameter of the outer cylindrical mold (120) and processes a sewer shaft with a waterproof plastic floor and a cast iron frame (10) with different intensity depending on the time of the production process creation of a sewer shaft with a waterproof plastic floor and a cast iron frame (10). 10. Procedure (200) for making a concrete sewer shaft with a waterproof plastic floor and a cast iron frame (10), which consists of: a. concentric placement of the inner cylindrical mold (110) and the outer cylindrical mold (120) b. placing the waterproof plastic floor (12) on the inner cylindrical mold (110) c. placing the steel ring (160) on the bottom of the inner cylindrical mold (110) d. placing the cast iron frame (14) on the steel ring (160) in order to form the upper edge of the concrete base of the shaft (11) e. concrete mixing f. dosing of concrete between the inner cylindrical mold (110) and the waterproof plastic floor (12) and the outer cylindrical mold (120) g. vibrating the inner cylindrical mold (110) and the waterproof plastic floor (12) with different power depending on the time of the production process h. finishing treatment of the bottom of the sewer shaft (10) with a hydraulic head (170) with different intensity. 11. The procedure (200) according to claim 10, characterized in that it consists of four phases: a. 1st phase - initialization of the device (100) for the production of a concrete sewer shaft with a waterproof plastic floor and a cast iron frame (10) b. 2nd phase - start of dosing of concrete and vibration of the inner cylindrical mold (110) and waterproof plastic floor (12) c. 3rd phase - stop of concrete dosing and start of hydraulic finishing d. 4th stage - stopping the vibration of the inner cylindrical mold (110) and waterproof plastic floor (12) and hydraulic treatment, removing the inner (110) and outer cylindrical mold (120), drying the concrete sewer shaft with waterproof plastic floor (10). 12. Initialization according to claim 11, indicated by the fact that it provides the conditions for the start of operation of the device (100) for the production of a concrete sewer shaft with a waterproof plastic floor and a cast iron frame (10). The initialization includes the concentric placement of the inner cylindrical mold (110) and the outer cylindrical mold (120), the placement of the waterproof plastic floor (12) on the inner cylindrical mold (110), the placement of the steel ring (160) on the bottom of the inner cylindrical mold (110), the placement of cast of the iron frame (14) on the steel ring (140) in order to form the upper edge of the concrete base of the shaft (11) and mix the concrete. 13. Dosing of concrete according to claims 10 and 11, indicated by the fact that it is performed in parallel with the vibration of the internal cylindrical mold (110) during the 2nd phase (220) of the production process, where the intensity of the concrete dosing is variable during the 2nd phase (220) of the production process (200). 14. Vibration according to claims 10 and 11, indicated by the fact that the inner cylindrical mold (110) vibrates together with the waterproof plastic floor (12), where the vibration starts with a time delay in relation to the start of concrete pouring and lasts through the 2nd phase (220) and the 3rd stage (230) of the production process (200), where the vibration intensity is variable during the 2nd stage (220) of the production process (200) and depends on the dimensions of the concrete sewer shaft with a waterproof plastic floor and cast iron frame (10). 15. Hydraulic processing according to claim 10 and 11, indicated by the fact that it takes place in parallel with the vibration in the 3rd phase (230) of the production process, where the hydraulic processing power is variable during the 3rd phase (230) of the production process (200) and is dependent on the dimensions of a concrete sewer shaft with a waterproof plastic floor and a cast iron frame (10).